1 // Copyright 2018 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package systemd 16 17 import "net" 18 19 // DialJournal returns no error if the process can dial journal socket. 20 // Returns an error if dial failed, which indicates journald is not available 21 // (e.g. run embedded etcd as docker daemon). 22 // Reference: https://github.com/coreos/go-systemd/blob/master/journal/journal.go. 23 func DialJournal() error { 24 conn, err := net.Dial("unixgram", "/run/systemd/journal/socket") 25 if conn != nil { 26 defer conn.Close() 27 } 28 return err 29 } 30